The Hyundai HL770-9 Wheel Loader, part of the robust 9 Series, is engineered for demanding operational environments. This powerful machine, featuring a 6.7-liter diesel engine and an automatic PowerShift transmission with four forward and four reverse gears, is designed for efficiency and reliability in construction, mining, and material handling applications. Its substantial operating weight, impressive bucket capacity, and advanced systems like articulated power steering and wet multi-disc brakes underscore its capability to handle heavy workloads with precision and durability. This comprehensive Service Repair Manual provides essential information for maintaining and repairing the Hyundai HL770-9 Wheel Loader. It covers a wide array of topics, including general maintenance, troubleshooting, detailed engine and transmission service, brake system procedures, electrical and cooling system diagnostics, and much more. The manual is an indispensable resource for owners, technicians, and mechanics, offering the technical specifications, diagrams, and step-by-step instructions necessary to ensure optimal performance, longevity, and safe operation of the equipment.